Which outcome occurs when sediment discharge surpasses capacity at canyon mouths?

💡 Explanation

Alluvial fan deposition occurs because increased sediment discharge leads to reduced carrying capacity, thus causing sediment to rapidly accumulate. This is stream gradient reduction, therefore sediment deposition, rather than erosion that would occur with increased flow velocity.

• Which mechanism primarily deflects moving air masses creating jet streams above surface streams influenced by the Hadley Cell?
• Which limit constrains the formation of extensive alluvial terraces in a rapidly uplifting mountain range?
• Which mechanism causes uplift and mountain formation along a reverse fault?
• Which risk increases significantly when low-silica lava erupts subglacially?
• Which outcome occurs when shield volcanoes overly a hotspot?
• Which process drives headwall erosion during cirque glacier formation in alpine regions?